Data Analytics

Dear Data Analyst: If you are learning Excel Use this:

𝗟𝗲𝗮𝗿𝗻 𝗗𝗮𝘁𝗮 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 𝗳𝗼𝗿 𝗙𝗥𝗘𝗘 (𝗡𝗼 𝗦𝘁𝗿𝗶𝗻𝗴𝘀 𝗔𝘁𝘁𝗮𝗰𝗵𝗲𝗱) 𝗡𝗼 𝗳𝗮𝗻𝗰𝘆 𝗰𝗼𝘂𝗿𝘀𝗲𝘀, 𝗻𝗼 𝗰𝗼𝗻𝗱𝗶𝘁𝗶𝗼𝗻𝘀, 𝗷𝘂𝘀𝘁 𝗽𝘂𝗿𝗲 𝗹𝗲𝗮𝗿𝗻𝗶𝗻𝗴. 𝗛𝗲𝗿𝗲’𝘀 𝗵𝗼𝘄 𝘁𝗼 𝗯𝗲𝗰𝗼𝗺𝗲 𝗮 𝗗𝗮𝘁𝗮 𝗦𝗰𝗶𝗲𝗻𝘁𝗶𝘀𝘁 𝗳𝗼𝗿 𝗙𝗥𝗘𝗘: 1️⃣ Python Programming for Data Science → Harvard’s CS50P The best intro to Python for absolute beginners: ↬ Covers loops, data structures, and practical exercises. ↬ Designed to help you build foundational coding skills. Link: https://cs50.harvard.edu/python/ https://t.me/datasciencefun 2️⃣ Statistics & Probability → Khan Academy Want to master probability, distributions, and hypothesis testing? This is where to start: ↬ Clear, beginner-friendly videos. ↬ Exercises to test your skills. Link: https://www.khanacademy.org/math/statistics-probability https://whatsapp.com/channel/0029Vat3Dc4KAwEcfFbNnZ3O 3️⃣ Linear Algebra for Data Science → 3Blue1Brown ↬ Learn about matrices, vectors, and transformations. ↬ Essential for machine learning models. Link: https://www.youtube.com/playlist?list=PLZHQObOWTQDMsr9KzVk3AjplI5PYPxkUr 4️⃣ SQL Basics → Mode Analytics SQL is the backbone of data manipulation. This tutorial covers: ↬ Writing queries, joins, and filtering data. ↬ Real-world datasets to practice. Link: https://mode.com/sql-tutorial https://whatsapp.com/channel/0029VanC5rODzgT6TiTGoa1v 5️⃣ Data Visualization → freeCodeCamp Learn to create stunning visualizations using Python libraries: ↬ Covers Matplotlib, Seaborn, and Plotly. ↬ Step-by-step projects included. Link: https://www.youtube.com/watch?v=JLzTJhC2DZg https://whatsapp.com/channel/0029VaxaFzoEQIaujB31SO34 6️⃣ Machine Learning Basics → Google’s Machine Learning Crash Course An in-depth introduction to machine learning for beginners: ↬ Learn supervised and unsupervised learning. ↬ Hands-on coding with TensorFlow. Link: https://developers.google.com/machine-learning/crash-course 7️⃣ Deep Learning → Fast.ai’s Free Course Fast.ai makes deep learning easy and accessible: ↬ Build neural networks with PyTorch. ↬ Learn by coding real projects. Link: https://course.fast.ai/ 8️⃣ Data Science Projects → Kaggle ↬ Compete in challenges to practice your skills. ↬ Great way to build your portfolio. Link: https://www.kaggle.com/

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SQL Cheatsheet 📝 This SQL cheatsheet is designed to be your quick reference guide for SQL programming. Whether you’re a beginner learning how to query databases or an experienced developer looking for a handy resource, this cheatsheet covers essential SQL topics. 1. Database Basics - CREATE DATABASE db_name; - USE db_name; 2. Tables - Create Table: CREATE TABLE table_name (col1 datatype, col2 datatype); - Drop Table: DROP TABLE table_name; - Alter Table: ALTER TABLE table_name ADD column_name datatype; 3. Insert Data - INSERT INTO table_name (col1, col2) VALUES (val1, val2); 4. Select Queries - Basic Select: SELECT * FROM table_name; - Select Specific Columns: SELECT col1, col2 FROM table_name; - Select with Condition: SELECT * FROM table_name WHERE condition; 5. Update Data - UPDATE table_name SET col1 = value1 WHERE condition; 6. Delete Data - DELETE FROM table_name WHERE condition; 7. Joins - Inner Join: SELECT * FROM table1 INNER JOIN table2 ON table1.col = table2.col; - Left Join: SELECT * FROM table1 LEFT JOIN table2 ON table1.col = table2.col; - Right Join: SELECT * FROM table1 RIGHT JOIN table2 ON table1.col = table2.col; 8. Aggregations - Count: SELECT COUNT(*) FROM table_name; - Sum: SELECT SUM(col) FROM table_name; - Group By: SELECT col, COUNT(*) FROM table_name GROUP BY col; 9. Sorting & Limiting - Order By: SELECT * FROM table_name ORDER BY col ASC|DESC; - Limit Results: SELECT * FROM table_name LIMIT n; 10. Indexes - Create Index: CREATE INDEX idx_name ON table_name (col); - Drop Index: DROP INDEX idx_name; 11. Subqueries - SELECT * FROM table_name WHERE col IN (SELECT col FROM other_table); 12. Views - Create View: CREATE VIEW view_name AS SELECT * FROM table_name; - Drop View: DROP VIEW view_name; Here you can find SQL Interview Resources👇 https://t.me/DataSimplifier Share with credits: https://t.me/sqlspecialist Hope it helps :)

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SQL Joins ✅

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Use of Machine Learning in Data Analytics

𝟯 𝗙𝗿𝗲𝗲 𝗦𝗤𝗟 𝗬𝗼𝘂𝗧𝘂𝗯𝗲 𝗣𝗹𝗮𝘆𝗹𝗶𝘀𝘁𝘀 𝗧𝗵𝗮𝘁 𝗪𝗶𝗹𝗹 𝗠𝗮𝗸𝗲 𝗬𝗼𝘂 𝗮 𝗤𝘂𝗲𝗿𝘆 𝗣𝗿𝗼 𝗶𝗻 𝟮𝟬𝟮𝟱😍 Still stuck Googling “What is SQL?” every time you start a new project?💵 You’re not alone. Many beginners bounce between tutorials without ever feeling confident writing SQL queries on their own.👨‍💻✨️ 𝐋𝐢𝐧𝐤👇:- https://pdlink.in/4f1F6LU Let’s dive into the ones that are actually worth your time✅️

I see so many people jump into data analytics, excited by its popularity, only to feel lost or uninterested soon after. I get it, data isn’t for everyone, and that’s okay. Data analytics requires a certain spark or say curiosity. You need that drive to dig deeper, to understand why things happen, to explore how data pieces connect to reveal a bigger picture. Without that spark, it’s easy to feel overwhelmed or even bored. Before diving in, ask yourself, Do I really enjoy solving puzzles? Am I genuinely excited about numbers, patterns, and insights? If you’re curious and love learning, data can be incredibly rewarding. But if it’s just about following a trend, it might not be a fulfilling path for you. Be honest with yourself. Find your passion, whether it’s in data or somewhere else and invest in something that truly excites you. Hope this helps you 😊

SQL Interviews LOVE to test you on Window Functions. Here’s the list of 7 most popular window functions 👇 𝟕 𝐌𝐨𝐬𝐭 𝐓𝐞𝐬𝐭𝐞𝐝 𝐖𝐢𝐧𝐝𝐨𝐰 𝐅𝐮𝐧𝐜𝐭𝐢𝐨𝐧𝐬 * RANK() - gives a rank to each row in a partition based on a specified column or value * DENSE_RANK() - gives a rank to each row, but DOESN'T skip rank values * ROW_NUMBER() - gives a unique integer to each row in a partition based on the order of the rows * LEAD() - retrieves a value from a subsequent row in a partition based on a specified column or expression * LAG() - retrieves a value from a previous row in a partition based on a specified column or expression * NTH_VALUE() - retrieves the nth value in a partition React ❤️ for the detailed explanation